Ferdinand gustave spindles



Patened'Aug. 26, 1919,

F. G. SPINDLER.

HRMACYTOMETEPI.

APPLICATION FILED MAYZTI 1918; Lqarh maga- UNITED sTATEs FERDINAND GUSTAVE SPINDLER, 01E" NEW YORK, N. Y., ASSIGNGR TG E. LEITZ, ENC., 0F

NEW YORK, N. Y., A CORPORATION F NEW HEMACYTOMETER.

Specification of Letters Patent.

. Application filed May 27, 1918. Serial No. 238,31*?.

To Il wlw/n. it 71mg/ concern: i

13e itl known that l, FERDINAND GUsTAvE SriNoLnn, a subject of the Emperor of Germany, residing 'at -L31 Vest 2l-ith street, New York city, in the count-y of New York and State of New York, have invented cer-V 'making them strong enough for practical use and at the same time easy to handle.

Myinvention solves these, ,'problems by making the slide of uniformi strength throughout and also facilitates'the removal of the 'cover plate.

Referring t0 the accompanying drawings Figure l is a top plan view of my device with the cover plate imposition as used. Fig. 2 is an enlarged longitudinal section on the .line 1 1 of Fig. l. Fig. 3 is an enlarged longitudinal section on the line ot' Fig. 1. Fig. 4 is a top plan view of a modification showing a scale slip with a single cross hatch or microscopic scale.`

. In the drawings 5 is a slide having supports l integral therewith and projecting from 4its top surface a niaterial distance above the top surface, thereby increasing the thickness of the slide, so that a cover plate 7 picked up.

Parallel with the supports 6 is a scale slip 8 which is cemented to the slide 5 direct-ly between the supports G and the top surface of which is in a plane a predetermined distance below the -`plane of the top surface of the supports 6. There is thereby formed between the scale slip 8 and the. two cover plate supports 6 two gut-ters 9 and these1 are connected by a cross glitter 10 running across the scale slip 8 thereby dividing it, sulistantially into two parts on each end of which is a cross hatching or microscopic scale 11. The cover plate 7 is adapted to rest on the cover plate supports (i so that the distance between the bottom ot the cover plate 7 and the top of the scale slip 8 is the same' as the -difference between the planes of the top surface of the scale slip S and the top surface of the cover supports 6. p f

1n use.a drop of blood to be examined is placed on one of the microscopic ystales 1l Vrcover plate 7 is then placed in posit A rops on they fyi resting thereon can be readily' shown in Fig. 1 and a drenv o another kim ot blood is dropped on the, other microscopia; scale 1l on the scale slip it in 1 and the thereon, squeezing out the two d lmicroscopic scales' 11- to the exact thickness required and any surplus from either 5. ing into the' gutters l) and 1t). ri`he gut,.- 41() makesl it impossible tor the 'two speci mens 'being examined to conuniugle tln'ougiz molecular action.

The en'lbodiinent of my device indieatwi in Fig. -i is adapted only for the exainirazI 'tion of one specimen and not for simultane ous examination ot' two inasmuch as there is:

only one microscopic scale 11 thereon.

1 claim: 1. A hzemacytolnetcr comprising a slide o? uniform thickness having a scale slip mounted thereon and projecting slightly above the level of the top surface of the slide. two coverplate supports. integral with said slide. and

parallelwith said scale slip and projecting materially above the levei ot' the top surface of said scale slip.

2. A hzcmacytometer comprising a slide of uniform thickness having a scale slip mounted thereon which has a cross gutter vaud a scale at each end projecting slightly above the level of the top surface of the slide, two cover plate supports parallel with said scale slip and projecting materially Aabove the level of. the top surface of said scale slip, said supports being inten-rai with said slide.

3. A hzcmackvtometer comprising a slide ot' uniform thickness havingr alscale siip mounted thereon which embodies a microscopie scale and project-ing slightiy above thelevel ot the topsurt'ace of the slide., two cover plate supports parallel with said scaie slip and projecting materially above the level of the top surface of said sctne slip. said supports being.r integral with said slide.

4f. In a hzcniaevtoiheter the combination with a slide ot' uniform thickness of two cover plate supports integral thcreaitn anu a scale slip mounted thereon projecting slightly above the top oi the siide. the piane of the top surface ot the two cover plate supports being an exact predetermined measurement above the plane the top surface. of said scaie slip. and a cover plate.

5. In a. hnmc'vtomcter the combination with a slide of uniform thickness ot' two uwer pmi@ m3390115 nsgza harmvx and n scala :5 35( mouzxwl between said suppwts 'inv/ingu (brass gutffr :md zg Scale .at auch and piojtng slightly above the wp of the Mide, the plano, of da@ 'wp surface of the ivm eimer pluie, suppgnfs bffng am exact, pwfgei'mned measurement above the plane-0f dm 'wp sluiac :mi sa'e shy? :md u cveplae. Y Q.

6.y fn a hmacytomeer the combination wh. a. Slide 'of uz'fomn thickness of iwf@ -two cowl' pmte Supporti being im .Qxzwt o* the, top Surface of Suid scalev slip, and a 

